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Thanks, I agree they sounds very good. As I understand the TAD 4001 drivers used in the RM7V was developed by Bart Locanthi especially for the Kinoshita/TAD horns. The horns has an even response distribution over its pattern which is unusual.

Rx-21a

The crossover frequency is 425Hz. It will be impossible exchange only capacitors, you need also exchange choke coils & base board.
So Kinoshita will say that you should exchange RX-21 to RX-21A whole unit.

Originally Posted by Tommy100

Hello,
What is the specifications for the RX-21 crossover used with the Kinoshita RM7V speakers?
Is it possible to repair them when the capacitors is old?

Bart Locanthi

He is a great engineer of electronics & speakers.
The relation of Locanthi & Shozo Kinoshita is told in this web.http://www.reyaudio.com/history-e.html
TAD TD-4001 is developed by Pioneer company when Kinoshita is employed.
Locanthi was a teacher in LS project of Pioneer, and Kinoshita was a leader of this project.
TAD speaker units were produced by this project.

Originally Posted by Tommy100

Thanks, I agree they sounds very good. As I understand the TAD 4001 drivers used in the RM7V was developed by Bart Locanthi especially for the Kinoshita/TAD horns. The horns has an even response distribution over its pattern which is unusual.